Which is most complex?
Responses
tissues
tissues
organ system
organ system
cells
cells
organs
organ system
What is the term for changes in the internal or external environment that cause a response?
Responses
messages
messages
signals
signals
stimuli
stimuli
nerves
nerves
stimuli
To determine which is the most complex out of the given options (tissues, organ system, cells, and organs), we need to consider the levels of organization in the human body.
Starting from the most basic unit, cells are the building blocks of life. They are the smallest and most fundamental unit of life, capable of carrying out various functions within the body.
Tissues are formed by groups of similar cells working together to perform a specific function. There are four main types of tissues in the human body: epithelial, connective, muscle, and nervous tissues.
Organs are composed of different types of tissues working together to perform a specific function. For example, the heart is an organ made up of muscle tissue, connective tissue, and nervous tissue, all working together to pump blood.
Organ systems are groups of organs that work together to carry out specific functions in the body. Examples of organ systems include the cardiovascular system (heart, blood vessels, and blood), respiratory system (lungs, trachea, and bronchi), and digestive system (stomach, intestines, and liver). Each organ system has a specific role in maintaining homeostasis and ensuring the proper functioning of the body.
Based on this hierarchy, we can conclude that the organ system is the most complex option among the given choices. It involves the coordination and integration of multiple organs working together to accomplish specific bodily functions.